diff --git a/airflow-core/src/airflow/ui/public/i18n/locales/zh-TW/dag.json b/airflow-core/src/airflow/ui/public/i18n/locales/zh-TW/dag.json
index 0e9ccd277e632..401a19ccbd19e 100644
--- a/airflow-core/src/airflow/ui/public/i18n/locales/zh-TW/dag.json
+++ b/airflow-core/src/airflow/ui/public/i18n/locales/zh-TW/dag.json
@@ -42,6 +42,7 @@
   },
   "deadlineAlerts": {
     "completionRule": "必須在 {{reference}}後 {{interval}} 內完成",
+    "completionRuleDynamic": "必須在 {{reference}}後的一段變動期間內完成",
     "count_one": "{{count}} 個期限",
     "count_other": "{{count}} 個期限",
     "referenceType": {